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What percentage of blood is Plasma?
55%
What vertebrates have blood flowing from respiratory system organs to tissues without first going to the heart?
Fishes
What is the correct order of blood flow in mammals and reptiles?
vena cava → right atrium → right ventricle → pulmonary circuit
Which of the following body structures would a red blood cell encounter first as it travels through your circulatory system if it is currently in your foot?
vena cava
Blood returning to the mammalian heart in a pulmonary vein drains first into the __________.
left atrium
True or False? Pulmonary veins carry oxygen-rich blood to the heart.
True
Blood returns to the heart via the _____.
Pulmonary veins
Arteries
Arteries carry blood away from the heart
Capillary beds
Site of nutrient and oxygen delivery to tissues
What part of blood transports O2
erythocytes